/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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#ifndef QLAYOUTENGINE_P_H+
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#define QLAYOUTENGINE_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists purely as an+
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// implementation detail.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include "QtGui/qlayoutitem.h"+
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#include "QtGui/qstyle.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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template <typename T> class QVector;+
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+
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struct QLayoutStruct+
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{+
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    inline void init(int stretchFactor = 0, int minSize = 0) {+
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        stretch = stretchFactor;+
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        minimumSize = sizeHint = minSize;+
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        maximumSize = QLAYOUTSIZE_MAX;+
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        expansive = false;+
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        empty = true;+
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        spacing = 0;+
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    }+
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+
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    int smartSizeHint() {+
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        return (stretch > 0) ? minimumSize : sizeHint;+
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    }+
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    int effectiveSpacer(int uniformSpacer) const {+
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        Q_ASSERT(uniformSpacer >= 0 || spacing >= 0);+
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        return (uniformSpacer >= 0) ? uniformSpacer : spacing;+
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    }+
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+
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    // parameters+
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    int stretch;+
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    int sizeHint;+
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    int maximumSize;+
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    int minimumSize;+
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    bool expansive;+
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    bool empty;+
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    int spacing;+
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+
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    // temporary storage+
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    bool done;+
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+
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    // result+
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    int pos;+
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    int size;+
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};+
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+
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+
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Q_GUI_EXPORT void qGeomCalc(QVector<QLayoutStruct> &chain, int start, int count,+
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                            int pos, int space, int spacer = -1);+
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Q_GUI_EXPORT QSize qSmartMinSize(const QSize &sizeHint, const QSize &minSizeHint,+
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                                 const QSize &minSize, const QSize &maxSize,+
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                                 const QSizePolicy &sizePolicy);+
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Q_GUI_EXPORT QSize qSmartMinSize(const QWidgetItem *i);+
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Q_GUI_EXPORT QSize qSmartMinSize(const QWidget *w);+
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Q_GUI_EXPORT QSize qSmartMaxSize(const QSize &sizeHint,+
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                                 const QSize &minSize, const QSize &maxSize,+
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                                 const QSizePolicy &sizePolicy, Qt::Alignment align = 0);+
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Q_GUI_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align = 0);+
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Q_GUI_EXPORT QSize qSmartMaxSize(const QWidget *w, Qt::Alignment align = 0);+
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+
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Q_GUI_EXPORT int qSmartSpacing(const QLayout *layout, QStyle::PixelMetric pm);+
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+
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/*+
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  Modify total maximum (max), total expansion (exp), and total empty+
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  when adding boxmax/boxexp.+
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+
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  Expansive boxes win over non-expansive boxes.+
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  Non-empty boxes win over empty boxes.+
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*/+
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static inline void qMaxExpCalc(int & max, bool &exp, bool &empty,+
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                               int boxmax, bool boxexp, bool boxempty)+
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{+
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    if (exp) {+
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        if (boxexp)+
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            max = qMax(max, boxmax);+
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    } else {+
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        if (boxexp || (empty && (!boxempty || max == 0)))+
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            max = boxmax;+
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        else if (empty == boxempty)+
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            max = qMin(max, boxmax);+
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    }+
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    exp = exp || boxexp;+
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    empty = empty && boxempty;+
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}+
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+
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QT_END_NAMESPACE+
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+
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#endif // QLAYOUTENGINE_P_H+
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